Integrated rigidity measuring device for rotating arm node

Abstract

The utility model discloses an integrated rigidity measuring device for a tumbler node. The integrated rigidity measuring device comprises integrated rigidity measuring equipment and auxiliary equipment, the integrated rigidity measuring device comprises a bolt, an inner positioning pin, a sleeve, a clamp spring and a force transmission pin. The two to-be-tested rotating arm nodes are arranged face to face and are connected through a force transmission pin; an inner positioning pin is arranged in the matching surface of the two to-be-tested rotating arm nodes, and the inner positioning pin penetrates through the two to-be-tested rotating arm nodes to form a fixed whole; and the fixed whole body is placed in the sleeve. According to the utility model, two nodes can be effectively combined, relative slippage caused by assembly factors is avoided, and the measurement precision can be greatly improved. The two nodes are combined together through the sleeve, the sleeve and the nodes are in interference fit and are installed into a whole, rigidity tests in the axial direction, the radial direction, the torsion direction and the deflection direction can be carried out, repeated disassembly and assembly are not needed, and measurement convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of swing arm node stiffness testing for rail transit vehicles, and relates to a swing arm node stiffness measuring device, in particular to an integrated swing arm node stiffness measuring device. Background Art

[0002] With the continuous development of urban transportation, rail vehicles have become an important part of urban rail transportation, and people are paying more and more attention to their safety.

[0003] The boom node is installed on the bogie of the rail vehicle. It can transmit the longitudinal traction and braking force between the bogie and the car body, and provide the deflection deformation of the train when traveling on a curve and the relative rotation between the car body and the bogie caused by the rotation of the bogie. Therefore, it is particularly important to accurately measure the anisotropic stiffness of the boom node.

[0004] Existing boom node measurement devices are all designed individually based on the test equipment and conditions, stiffness direction, etc. to simulate the product loading status, but no excessive research has been conducted on the measurement accuracy, and no excessive research has been conducted on whether the simulated test conditions meet the use requirements.

[0005] Therefore, the existing boom node measurement device has the following disadvantages:

[0006] (1) Low measurement accuracy

[0007] One situation is that existing arm nodes are usually installed in groups of two in vehicles and then removed after being pressed, which is destructive to the assembly. This causes the product to deviate from the actual installation state during the test simulation measurement process. The test simulation process cannot completely press the two nodes into one as during installation, and repeated assembly makes it difficult to ensure the accuracy of all-directional measurements.

[0008] Another situation is: the existing boom node measurement device is to simply assemble the two boom nodes by using two tapered locating pins through a screw, and then compress them together using a pressure plate after assembly. When measuring the axial and radial stiffnesses, the loading state can be simulated for measurement. However, when measuring the torsional and deflection stiffnesses, complex disassembly and assembly are required on the torsional equipment. The two nodes are often affected by the assembly conditions and slip, resulting in inaccurate torsional and deflection measurement results.

[0009] (2) Poor functionality and convenience of stiffness measurement

[0010] The existing arm node measurement devices are independent in axial, radial, torsion and deflection, and cannot be shared. They often need to be disassembled and assembled continuously, which is complicated and single. The device has many parts, complex assembly and cumbersome operation, resulting in low efficiency.

[0011] Purpose of the Invention

[0012] In order to solve the shortcomings and deficiencies in the prior art, the utility model discloses an integrated stiffness measurement device for a swing arm node, aiming to improve the accuracy and convenience of measuring the stiffness of the swing arm node in all directions.

[0013] By using the swing arm node integrated stiffness measuring device of the utility model, two nodes can be effectively combined, relative slippage due to poor assembly will not occur, and the measurement accuracy can be greatly improved.

[0014] By using the integrated stiffness measuring device for the swing arm node of the utility model, two nodes are combined together by a sleeve, and the upper and lower sides of the sleeve are fixed with retaining springs. After installation, it is a whole, and tests on stiffness in four directions, namely axial, radial, torsion and deflection, can be carried out. In this way, there is no need for repeated disassembly and installation, thereby improving the convenience of measurement. Utility Model Content

[0015] The technical solution of the utility model is as follows:

[0016] An integrated stiffness measuring device for a swing arm node comprises an integrated stiffness measuring device and auxiliary equipment; the integrated stiffness measuring device comprises a bolt, an inner positioning pin, a sleeve, a retaining spring and a force transmission pin; two swing arm nodes to be measured are arranged face to face and connected via a force transmission pin; the mating surfaces of the two swing arm nodes to be measured are built with an inner positioning pin, the inner positioning pin penetrates the two swing arm nodes to be measured and forms a fixed whole through bolts; the fixed whole is placed in a sleeve, and the sleeve port is fixed with a retaining spring.

[0017] Furthermore, the inner positioning pin passes through the centers of the two rotating arm nodes to be measured.

[0018] Furthermore, the force transmission pin includes two internal fixing structures that cooperate with each other.

[0019] Furthermore, the auxiliary equipment includes a positioning block, a pressing block and an adapter.

[0020] Furthermore, when measuring the axial, radial, torsional or deflection stiffness, the positioning block is required to position and fix the integrated stiffness measuring device.

[0021] Furthermore, when measuring the radial stiffness, the radial load needs to be applied with the aid of the pressing block.

[0022] Furthermore, when measuring the torsional and deflection stiffness, the inner positioning pin and the torsion device need to be connected with the adapter.

[0023] Furthermore, the fixing unit is interference fit with the sleeve.

[0024] Furthermore, one end of the fixed whole is fixed by a limiting end in the sleeve, and the other end of the fixed whole is fixed in a clamping groove of an outer port of the sleeve by a retaining spring.

[0025] The utility model has the following beneficial effects:

[0026] (I) Simplicity and reusability of the integrated device

[0027] The utility model of the integrated stiffness measuring device for the swing arm node only needs five parts to assemble two swing arm nodes together, and the operation is performed with the help of a press machine. The whole process does not require high-intensity labor and repeated operations, and an integrated assembly is realized. After the assembly is completed, axial, radial, torsion and deflection tests can be performed without repeated installation and disassembly, and it has the advantages of simplicity (convenience) and repeated practicality.

[0028] (II) Accuracy and convenience of test results

[0029] The utility model aims to improve the accuracy of the test results of the stiffness of the pivot joint, so that the two pivot joints are pressed into one sleeve, which is closer to the actual application state of the product, and the two pivot joints are combined into one by other parts to effectively combine them, avoiding relative slippage during the stiffness test, thereby improving the accuracy of the test results.

[0030] (III) The utility model of the integrated stiffness measuring device for the pivot joint has a reasonable design and a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the utility model of the integrated stiffness measuring device of the swing arm node;

[0032] Figure 2 It is a schematic diagram of measuring axial stiffness using the utility model swing arm node integrated stiffness measuring device;

[0033] Figure 3 It is a schematic diagram of radial stiffness measurement using the utility model swing arm node integrated stiffness measurement device;

[0034] Figure 4 It is a schematic diagram of measuring torsional stiffness using the utility model of the integrated stiffness measuring device for the swing arm node;

[0035] Figure 5 It is a schematic diagram of measuring the deflection stiffness by using the utility model of the integrated stiffness measuring device of the swing arm node;

[0036] Among them, 1-bolt; 2-inner positioning pin; 3-sleeve; 4-circlip; 5-node of the swing arm to be tested; 6-force transmission pin; 7-positioning block; 8-pressure block; 9-adapter. DETAILED DESCRIPTION

[0037] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0038] Reference Figure 1 As shown, the integrated stiffness measuring device of the boom node of this embodiment includes an integrated stiffness measuring device and auxiliary equipment; the integrated stiffness measuring device includes a bolt 1, an inner positioning pin 2, a sleeve 3, a retaining spring 4 and a force transmission pin 6, the bolt 1, the inner positioning pin 2 and the force transmission pin 6 are arranged in the sleeve 3, and the retaining spring 4 is arranged at the port of the sleeve 3.

[0039] The two swing arm nodes 5 to be tested are arranged face to face and connected and fixed by a force transmission pin 6, so that the two separate swing arm nodes 5 to be tested are combined into a whole during the test.

[0040] In this embodiment, the force transmission pin 6 is an internal fixed structure, which includes two cylinders (cylinder A and cylinder B), each with a length of 20 mm. Among them, 1 / 2 of cylinder A is inserted into one of the pivot nodes 5 in a transition fit, 1 / 2 of cylinder B is inserted into the other pivot node 5, and the other 1 / 2 of cylinder A and cylinder B are mutually sleeved.

[0041] The mating surfaces of the two rotating arm nodes 5 to be tested are built with internal positioning pins 2, which penetrate the two rotating arm nodes 5 to be tested to form a fixed whole, so that the two rotating arm nodes 5 to be tested will not slide relative to each other.

[0042] Preferably, the inner positioning pin 2 passes through the centers of the two swing arm nodes 5 to be measured.

[0043] The two swing arm nodes 5 to be measured are placed in the sleeve 3 as a whole, and the retaining spring 4 is fixed at the end of the sleeve 3, which is an integrated stiffness measurement device.

[0044] In this embodiment, a pressure device is used to press the two swing arm nodes 5 to be tested (the above-mentioned two swing arm nodes 5 to be tested as a whole) into the sleeve 3, and the port is fixed using a retaining spring 4. In this way, the two swing arm nodes 5 to be tested can form a more fixed whole, that is, an integrated stiffness measurement device, thereby improving the accuracy of subsequent stiffness measurement test results.

[0045] Among them, the bolt 1 passes through the two inner locating pins 2, is located at the center of the inner locating pins 2, and extends out at both ends. It mainly connects and fixes the positions of the two inner locating pins 2, and also plays a supporting role when measuring the axial and radial stiffness.

[0046] Among them, the auxiliary equipment includes a positioning block 7, a pressure block 8 and an adapter 9; when measuring axial, radial, torsional and deflection stiffness, the positioning block 7 is required to position and fix the integrated stiffness measuring device; when measuring radial stiffness, the pressure block 8 is also required to apply radial load; when measuring torsional and deflection stiffness, the adapter 9 is also required to connect and fix the inner positioning pin 2 and the torsional device.

[0047] like Figure 2 and Figure 3 As shown, the axial and radial stiffness are measured using the integrated stiffness measurement device for the swing arm node of this embodiment:

[0048] The integrated stiffness measuring device is placed on the positioning block 7 along the axial or radial direction, and the positioning block 7 serves as an equal height block; a certain load is applied in the axial or radial direction by the loading device, so that the axial or radial stiffness test process can be realized.

[0049] like Figure 4 As shown, the torsional stiffness measurement is performed using the integrated stiffness measurement device for the swing arm node of this embodiment:

[0050] Placing the integrated stiffness measuring device on the positioning block 7 in the radial direction;

[0051] The positioning block 7 is connected to the torsional stiffness machine through the adapter 9, so that the entire integrated device can be subjected to torsion testing under the action of the torsional stiffness machine; the rotation is transmitted through the force transmission pin 6, and the internal positioning pin 2 fixes the inside of the two swing arm nodes 5 to be tested, so that the inside of the two swing arm nodes 5 to be tested can rotate simultaneously without sliding, thereby improving the accuracy of the torsional stiffness test results.

[0052] like Figure 5 As shown, the deflection stiffness is measured using the integrated stiffness measurement device for the swing arm node of this embodiment:

[0053] Will be like Figure 4 As shown, the integrated stiffness measuring device is rotated 90° and installed in a torsional stiffness machine. Due to the presence of a force transmission pin 6 inside and the protection of a sleeve 3 outside, the two swing arm nodes 5 to be tested can be deflected and rotated together to achieve a deflection test.

[0054] Due to the particularity of the actual application and assembly of the swing arm node, there are inaccurate results and complicated operations in the simulation test. The use of the swing arm node integrated stiffness measurement device of this embodiment can effectively solve this problem.

[0055] The above description is only a preferred embodiment of the present invention and does not constitute a limitation on the protection scope of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A boom node integrated stiffness measurement device, characterized in that: The integrated stiffness measuring device for the swing arm node includes an integrated stiffness measuring device and auxiliary equipment; The integrated stiffness measuring device comprises a bolt, an inner positioning pin, a sleeve, a retaining spring and a force transmission pin; two swing arm nodes to be measured are arranged face to face and connected via a force transmission pin; the mating surfaces of the two swing arm nodes to be measured are built with inner positioning pins, the inner positioning pins penetrate the two swing arm nodes to be measured and form a fixed whole through bolts; the fixed whole is placed in a sleeve, and the sleeve port is fixed with a retaining spring.

2. The integrated stiffness measuring device for a swing arm node according to claim 1, characterized in that: The inner positioning pin passes through the centers of the two rotating arm nodes to be measured.

3. The integrated stiffness measuring device for a swing arm node according to claim 1 or 2, characterized in that: The force transmission pin includes two inner fixing structures that cooperate with each other.

4. The integrated stiffness measuring device for a swing arm node according to claim 1 or 2, characterized in that: The auxiliary equipment includes a positioning block, a pressing block and an adapter.

5. The integrated stiffness measuring device for a swing arm node according to claim 4, characterized in that: When measuring axial, radial, torsional or deflection stiffness, the positioning block is required to position and fix the integrated stiffness measuring device.

6. The integrated stiffness measuring device for a swing arm node according to claim 5, characterized in that: When measuring the radial stiffness, the radial load needs to be applied with the aid of the pressing block.

7. The integrated stiffness measuring device for a swing arm node according to claim 6, characterized in that: When measuring the torsion and deflection stiffness, the inner positioning pin and the torsion device need to be connected with the adapter.

8. The integrated stiffness measuring device for a swing arm node according to claim 1 or 2, characterized in that: The fixing unit is interference fit with the sleeve.

9. The integrated stiffness measuring device for a swing arm node according to claim 1 or 2, characterized in that: One end of the fixed whole is fixed by a limiting end in the sleeve, and the other end of the fixed whole is fixed in a clamping groove of an outer port of the sleeve by a clamping spring.

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